Issue #3363045: Feature(s) missing documentation

README.md

@@ -3,6 +3,10 @@
 The Twig Tweak module provides a Twig extension with some useful functions
 and filters that can improve development experience.
 
+Some functions and filters are built in the Twig Tweak module, while others are
+simple wrappers to integrate Drupal functions and services into Twig (for
+example: `format_size`, `drupal_view_result`).
+
 ## Requirements
 
 This module requires no modules outside of Drupal core.

docs/cheat-sheet.md

@@ -226,6 +226,7 @@ images when used in an `<img/>` tag.
 ```
 
 ## Format size
+Generates a string representation for the given byte count.
 ```twig
 {{ 12345|format_size }}
 ```